Apparatus for welding tubes.



H. DICKE & E. KLINKMANN. APPARATUS FOR WELDING TUBES.

APPLICATION FILED JAN.2, 1908.

t 939,591. v Patented NOV.9, 1909.

'heat the tube along the seam,

HUGO DICKE, OF FRANKFORT0N-THEMAIN, vAND. EMIL KLINKMANN, 0F ZAVODZIE,

NEAR KATTOWITZ, GERMANY, ASSIGNOBS T0 THE CORPORATION or DELLWIK- FLEISCHER, VVASSERGAS GESELLSCHAFT M. `B. H., 0F FRANKFOBT-QN-THE-MAIN,

GERMANY.

APPARATUS FOR WELDING TUBES.

lpplication tiled January '2, 1908. 'Serial No. 409,028.

l To all whom it may concern:

'Be it known that we, HUGO DICKE, (director,) and EMIL KLINKMANN, (engineer,) both subjects of the German Emperor, HUGO DICKE being resident of Frankforton-the-Main, Germany, MarienstrasseNo. 5, and EMIL KLINKMANN', being resident of Zawodzie, near Kattowitz, Silesia, Germany, larbarastrasse, have invented a new and useful Improvement in Apparatus forWVelding Tubes, of which the following is a speciication.

The object of the invention is to provide a compact and eflicient form of apparatus involving a carriage' for supporting a length of tube to be welded along av lo itudinal seam, two c opera'tingA yburners a justably mounted on said'carriage and adapted to both interiorly and exteriorly, to bring the edges to welding temperatur-said burners bei ladjustable von the carriage so 'as to be'use incon- ,nection with tubesof different diameters,'

and also relatively adjustable withrespect to each other, so that they may bel brought in relatively close engagement with the portions of the tube to be heated. Associated with the `carriageiin-the welding operation are a pair of welding rolls between which is located a mandrel provided with peripherally spaced rollers adapted to engage the interior of the tube and assist in `the fe'edi operation of the tube through the rolls an also to cause one of its peripheral 'rollers to engage the under surface of the heated ed es of the tube and by means of the coperation of the adjacent roll to effectively weld said heated edges into a homogeneous joint. The mandrel with its peripherally spaced rollers permits the tube, 'in the process of welding the seam,- to be passed through' the rolls without danger of being jammed therein and without liability of bursting the tube at the welding points.

In the accompanying drawings,A Figure 1 .is a side elevation, partly in section, of the welding apparatus constructed in accordance with the invention. Fig. 2 is a vertical cross 'section through the tube supporting carriage and heating apparatus. Figs. 3 and 4 are enlarged cross sectional and longitudinal sectional views of the mandrel and coperating rolls.

Referring to the drawings, -b indicates the Specification of Letters Patent.

Patented Nov. 9, 1909.

platform of a carriage, mounted upon suitable wheels L, which operate upon rails, which may be laid between the preliminary tube* shaping machine, and the ultimate welding rolls. Mounted upon the platform I) area series of transversely disposed rollers a which serve to support the tube and permit the same to be moved transversely of the carriage, in position to be heated by the burners, and also from such heating position into engagement with the welding rolls and mandrel, to be hereinafter described.

Mounted for vertical adjustment ou the platform b is the burner carrying frame, consisting of a framework f, spaced laterally with respect to the tube'supporting rolls a so as to permit said frame f to be adjusted in a vertical direction. Said frame f iseonveniently-su-pported at four points by means of'jack screws e which are simultaneously operated to raise and lower the frame f by means of gearing comprising a shaft w' operated by a hand wheel s, upon which shaft is mounted worms en aging worm gears u, upon twol countershafts, each of which is provided withbevel gears o on the respective ends, which drive bevel pinions fw, which in turn c'onstitute portions of rotatory l nuts engagingthe upper surface of the platform 72 and operating with the threaded Shanks of the jack screws e to raise and lower the latter to any desired extent. By rotating the hand wheel s in one direction or the other, it will be obvious that the several jack screws will be raised and lowered simultaneously, and consequently the frame f Will be correspondingly raised or lowered.

Mounted on the frame f is a bracket or. support g, in which is supported a lower burner c which extends transverselly of *the platform b and is adapted to heat t e entire length of the tube 1" at the edges thereof where the weld is to be eifected. Carried by the frame f are two yokes j, from which the upper burner d is suspended by a suitable ladjusting means, as ropes or cables to permit said upper burner to be moved toward and from the'lower burner, ani-therefore to be brought in juxtapositionto the edges of the-tube. Inasmuch as the position of the tube, on the platform Z) of the carriage is determined by the rollers a, it will be apparent that the two burners c and d may be adjusted to accommodate any size tube. For

instance, both burners may be simultaneously vadjusted by means of the jack screws e u'ntil the lower burner c is in proper position, after. which the upper burner d may be ad justed with respect to thlower burneraud the tube.

" edges thereof to be welded, and the upper burnerl d is adjusted to overlie the outer edges of the seam, as indicated in Figs. 1 and 2. 'Ihe heat of the burning gas then raises ythe temperature ofthe metal at the edges of theseam over the entire length of the latter, without, however, unduly heating the remaining portion of the tube, so that the heat is entirely localized along the line of the proposed weld and a, material saving in the amount of heat required is effected. It is found desirable tosimpart a small reciprocatory movement to the tube during the heating operation to insure uniformity of the heating over the entire length of the edges to be welded.V While the heating is being effected, the carriage ismoved'laterally from its `position in front of the tube forming apparatus yto a point in front of the Weldin mechanism. The latter consists of a man rel n and two suitably shaped rolls m, lm, lying on eachside of the mandrel, said mandrel, and the rolls being adapted to engage the tube and feed the same forward. The initial forward movement necessary to engage the tube with the rolls and the man- `drel is effected by a hydraulic jack or other appropriate means Z locatedjon the frame f. After the forward edge of the tube has been engaged with the rolls m, m and the mandl'el n, these elementswill grip the tubel and feed it forward.

innersurface of the tube. The upper roller o lies below the upper roll m and cooperates with the latter to force the heated edges of the pipe together and weld the same into a uniform, homogeneous joint.

After the welding has been completed, the

tube is withdrawn from the rolls in any pre the tube at the joint,-the amount of gas required to effect the heating is reduced to a minimum, and the entire operation, including the heating and welding is effected in a most expeditious and eflicient manner.

YVhat we claim is 1. In a tube welding apparatus, the combination of a carriage, a tube support on said carriage, a burner support vertically adjustable on said carriage, and burners relatively adjustable toward and from each other on said burner support.

2. In a tube welding apparatus, the combination of a carriage, tube supporting rollers on said carriage, a burner support vertically adjustable on said carriage, and burners relatively adjustable toward and from each other on said support.

3. In a tube welding apparatus, the combination of a carriage, a tube support on said carriage, a burner support vertically adjustable en said carriage, burners relatively adjustable toward and from each other on Said burner support, welding rolls, and a cooperating' mandrel, adapted to receive. the tube from the carriage and Weld the heated edges thereof.

4. In a tube welding apparatus, the combination of a reciprocatory carriage, a tube support on said carriage, a burner support, including a vertically adjustable frame and supporting yokes on said carriage, a lower burner mounted on said frame, an upper burner adjustably mounted on said yokes, Welding rolls and a coperating mandrel adapted' to receive the tube from the carria e. l

n testimony, that we claim the foregoing as our invention, We have signed our names in presence of two witnesses` this nineteenth day of December 1907.

HUGO DICKE. EMIL KLINKMA NN.

lVitnesses HENRY HASPER, WOLDEMAR HAUPT. 

